Ejecting apparatus for presses



Mmh m 1924a mwsssa F. S. CARVER EJECTING APPARATUS FOR PRESSES Filed D60. 22 1920 2 Sheets-Sheet l N N QM u 1' INVENTOR J/aeal 5 6% ATTORNEY March 11 1924.. 1,48%,633

F. s. CARVER I EJECTING APPARATUS FOR PRESSEs Filed Dec. 22 1920 2 Sheets-Sheet Z Z5 Z2 19 Z2 l4 \4 5 &

INVENTOR Jam 5.6m

ATTOR N EY illl, 192d.

FRED S. CARVER, OF EAST ORANGE, NEW JERSEY.

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' Application filed December To all whom it may concern.-

Be it known that LFRED S. CARVER, a citizen of the United States, and a resident of East Orange, county of Essex, and State of New Jersey, have invented certain new and useful Improvements in Ejecting Apparatus for Presses, of which the following is'a specification.

My invention relates to an ejecting apparatus for presses. The invention is herein described as applied to cocoa presses of the general type manufactured by European manufactuers and imported into this country for many years. In such machines the cocoa cakes are removed one by one by screwing up on a portable hand screw jack. This cumbersome and laborious operation of screwing out the cakes by hand is entirely eliminated by the present invention, the cakes being removed according to my invention by a simple and efficient ejecting apparatus built into the press.

The object of the invention is the provision of ejecting mechanism permanently located within the press and which is so constructed as to be simple and compact and out of the way and not readily gotten out of order, and whereby the contents of a'plurality of press pots located one above another can be ejected simultaneously by the application of hydraulic or other suitable power and with minimum trouble and loss of time. Other objects of my invention will appear in connection with the following description of an embodiment thereof.

In the accompanying drawings, Fig. 1 is a side view of a cocoa press provided with an ejector in accordance with my invention. Fig. 2 is a view at right angles to Fig. 1. Fig. 3 is a sectional detail view taken on the line 3-3, Fig. 1. Fig. 4 corresponds to a portion of Fig. 3, with the e ector mechanism in its upper position, and Fi 5 is a sectional detail view taken on the lines 55, Fig. 2.

The cocoa press to which the invention is shown applied comprises a base 10, containing a hydraulic piston, and an opposing press head 11 connected together by means of posts 12. Movable press platens 13 are interposed between the press heads and 22, 1920. Serial No. 482,489.

frames or brackets 14 are secured on each side of the press and are provided with runways 15 for receiving lugs 16 of the press pots 17, which can be moved in and out of the press upon the runways.

The construction so far described is employed in presses of the prior art and is not of. my invention per se, the invention claimed herein being confined to the ejecting mecha nism and the combination thereof with the press.

The press pots 17 are stopped, when withdrawn from the press, by the lugs 16 there of coming into contact with the plate 18, at the extreme outer face or surface of the brackets 14. (See Figs. 2 and 5.) Substantially opposite the middle of the pots 17 in such outer position a pair of vertical slideways 19 are proveded in each side of the frames 14. Such slideways 19 slidably receive the side bars 20 0f the ejector slide which is designated generally by the reference numeral 21.

Said ejector slide 21 is of generally ladder-like form and comprises the side bars 20 and a series of cross bars 22, one below each pot station, and each having an upward extension, which is adapted when the ejector 21 is elevated, to enter the press pot 17 from beneath and raise the pot piston or movable bottom 23 with the hard press cake 24: of cocoa. or other material thereon so that the same is freed from the press pot and may readily be removed. The piston or movable bottom 23 of the press pot is lowered to the bottom of the pot 17, as the ejector slide 21 retreats, where it is supported by the flange or lip 25 of the press pot 17.

The side bars 20 are connected at or near their upper ends by means of a cross head 26, and the actuating power is preferably applied at the middle of such cross-head in order to obtain a smooth balanced action of the ejector slide.

The preferred source of power, particularly in connection with the hydraulic press, is a small hydraulic cylinder 27 and its piston 28, the latter being preferably directfly connected to the middle of cros head 26.

Ell

Fluid under pressure is admitted below the piston 28 by opening valve 29 when it is desired to raise the ejector and to free the hard packed cakes 24 from the pots 17, the outlet valve 30 being closed. This operation is one that required the expenditure of a considerable amount of power, but the desired power can readily be supplied by means of'a comparatively small hydraulic cylinder. The pots 17 are firmly held in t eir runways 15, and the upward projections of the cross members 22 of the ejector slide being broad and fiat and accurately guided in the guideways, it is possible to remove the caked material from the pots by direct upward movement, thus readily freeing the caked material from the press pots. The press pots are preferably provided with an enlarged bore at their upper portion, in accordance with my Patent No. 1,247,078 dated Nov. 20th, 1917, whereby removal of the press cake is faciliated. To lower the ejector slide, after the press cakes have been freed and removed, the valve 29 is closed and the outlet valve 30 is opened, whereupon the ejector slide 21 and pistons 23 move down by gravity. A bleeder pipe 31 may be connected to a chamber 32 formed about the piston 28, if desired, to bleed off any fluid escaping past the piston packing.

It will be noted that the ejector slide is strong and rigid and well guided in the machine frame and that power is applied direct in the median line thereof. It results from this construction that the device is highly effective in its operation and in particular that the pot pistons23 while being raised and lowered are kept in horizontal position and there is no tendency for same to bind or j am either in being raised or lowered, which would take time and trouble to correct and would lower the output and decrease the efficiency of the apparatus.

The embodiment of the invention shown is only for illustration and for affording an understanding of the invention, 'andnot for limitation therof. Changes and modifications may be resorted to within the scope of my claims and without departing from the principle of my invention.

I claim: j

1. Ejecting apparatus for presses comprising a pair of longitudinally movable members forming a permanent part of the press assembly, said members being in parallel spaced relation, a plurality of cross bars interconnecting the longitudinally movable members at points spaced apart, means on the cross bars for entering a plurality of press pots from beneath and ejecting caked material therefrom, and manual control means for imparting longitudinal movement to said longitudinally movable members.

2. Ejecting apparatus for presses, comprising a pair of spaced substantially paralslide members for entering press pots and ejecting the contents therof, and manually controllable meansfor actuating'said slide members.

3. Ejecting apparatus for presses, comprising a slide of generally ladder-like form,

slideways therefor in the press frame, the,

cross bars of said slide being provided with projections adapted to enter pots held 1n the press, and a, cross-head having power means applied at substantially the middle thereof.

4. In a press, a frame having runways, press pots positioned in said runways, one

above another in the opposite sides of the I frame, slideways provided in each sidepfi said frame, an ejector slide comprising slde bars mounted to slide in said slideways, cross bars provided with projecting portions adapted to enter and eject the contents of the press pots held in said runways and a crosshead and slide, and actuating means on said press applied to said cross head at substantially the middle thereof.

5. Ejecting apparatus prising a movable member provided with a plurality of guides to guide same and keep it always in parallelism, means on said memher for entering press pots and ejecting thecontents thereof, and means for moving said member relative to the press pots.

6. In a press, a frame having runways for press pots in its opposite sides, a plurality of press pots positioned in said runways,

slideways provided in each side of said. frame, an ejector slide mounted toslide in p the slideways in said frame and comprising cross members adapted to enter the pots and kept in parallelism with said runways by said slideways, said ejector slide having a crosshead, and hydraulic means connected to said crosshead at about the middle thereof for imparting movement to the ejector slide.

7. An ejector for presses, comprisinga slide of generally ladder'like form adapted to be slidably mounted within a press, slideways in said press for said slide, a plurality of press pots, said slide having members adapted ,to enter the press pots simultaneously to eject the contents thereof, and a hydraulic cylinder having a piston, and means for connecting said piston to said slide on substantially the median line thereof.

8. In a press, a frame having runways,

for presses, com- 1 press pots slidably mounted in said runways.

each arranged to be movablein-to ejecting position in vertical alignment with one another, a fluid pressure cylinder securedto 1 ,eeeess each arran d to be moved into an ejecting and pressure means on the press frame for position with the pots arranged along the raising said ejecting device, whereby Said sa'me axial line, an ejecting device arrnn projections operate to eject press cakes from 10 for up and down movement, said ejecting the press pots.

8 device comprising a plurality of projections In testimony that I claim the foregoing, 1

adapted to be simultaneously introduced uphave signed my name hereto. wardly into the press pots from Mneath, FRED S. CARVER. 

